These cards were also included in the Collector Pack
NZ-CP-57
and were overprinted on the reverse with
Collectors Issue 1997 or International Collectors Issue 1997 for those
in the International Pack.
There is also a fifth card in this series, which was
only available in the Collectors Pack. See
Fifth Card.
These cards also feature in the second Proof Issue series, see
Proof
Issue 2.